Definition(s)
Base
The supporting substructure upon which the revolving upper-structure is mounted.
Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards
Oil & Gas Drilling Glossary - IADCLexicon.org
The supporting substructure upon which the revolving upper-structure is mounted.
Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards